gemstone - a hard colorful mineral that has brilliant or glassy luster ore-rock that contains a metale or economically useful mineral smeltings - the procces by which ore is melted to seperate the useful metals from other elements alloy - a solid mixture of two o more metals .
Outline
The Uses of Minerals
Minerals are a source of metals, gemstones, and other materials used to make many products.
Gemstones
Gemstones are hard colorful minerals that have brillant or glassy lusters.
Metals
Metals are useful minerals that could be streatched into wire, flattened into sheets and hamered or molded without breaking.
Other Useful Minerals
Other useful minerals include Quartz, Fluorite, Calcite Kaolin and Gypsum.Quartz can be used in making glass and other electronic equipment and watches. Optical instruments can be made using the clear crystals in the mineral calcite.
USEFUL MINERALS
Ores
Ores are rocks containing metal or economically useful mineral.
Prospecting
Mining
There are three types of mines. They are open pit mies, shaft mines and strip mines.
Table of Contents
4- 3 Mineral Resources
Vocabulary
gemstone - a hard colorful mineral that has brilliant or glassy lusterore-rock that contains a metale or economically useful mineral
smeltings - the procces by which ore is melted to seperate the useful metals from other elements
alloy - a solid mixture of two o more metals .
Outline
The Uses of Minerals
Ores
Prospecting
Mining
Smelting